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Exercise Complete each sentence with correct word or phrase. peer pressure pregnancy armpit develop 1. Namo took my pencil and hide it in his ........... 2. New York City is more beautiful than Buriram. It has more than Buriram. 3. My sister shouted after she checked her is going to have a baby soon. 4. Poom is more 5. Fino smokes now. mom about this. matured test. She than Book. He doesn't talk in class. let him to do that. I will tell his

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A. Fill in the blanks with "much", "many" or "a lot of". 1. Have you got .mนC). money? My brother has 9 lof_of books. 3. There isn't ..0ucn sugar. 4. Have you got .. beer? 5. He has got cousins. 6. He drinks too whisky. 7. She doesn't smoke cigarettes. 8. There aren't เflowers in the vase. 9. Is there cheese in the fridge? 10. Are there . ... bananas in the supermarket? 11. She eats chocolate everyday. 12. There are too .... people at the z0o today!

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6. ณ อุณหภูมิ 28 C อากาศมีความชื้นสัมพัทธ์ 60% อากาศขณะนั้น 9 ลูกบาศก์เมตร สามารถรับไอน้ำ ได้อีก 180 กรัม ก็จะอิ่มตัว จงหาความชื้นสัมบูรณ์ของอากาศเท่ากับเท่าใด Cs Scanned with CamScanner

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Refer to the table, answer questions 7-9. Table: Some properties of elements at 25C and 1 atm pressure Hardness or Appearance Electricity conductivity Element Melting Boling point (C) toughness point (C) Shiny, silvery liquid Mercury Yes -39 357 Colourless gas Hydrogen No -259 -253 Iron Shiny, silvery solid Hard and tough Yes 1,538 2,861 Sulphur Yellow solid Hard and brittle No 120 445 Sodium Shiny, silvery solid Soft and tough Yes 98 883 Silicon Shiny, silvery solid Hard and brittle Slightly 1,414 3,265 Boron Black Solid Hard and brittle No 2,030 3,900 Chlorine Yellowish green gas No - 102 -35 Bromine Orange red liquid No -7 59 Oxygen Colourless gas No -219 - 183 Magnesium Shiny, silvery solid Hard and tough Yes 650 1,090 lodine Shiny, dark purple Hard and brittle No 113.5 184.5 Solid 7. Which elements are metals and which are non-metals? 8. Is silicon a metal or non-metal or metallloid? Justify your reason. 9. What are the uses of metals, non-metals and metalloids in daily life? Give examples. 0. Blement A is a solid with shiny ธurfaces, good electricity and heat conductivity, the density Or 7.8 g/cm, boiling point of 1,090 C and melting point of 650 C. Is Element A a metal or non-metal? Justify your reasons. 67

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Read the text carefully. Years ago there wasn't a problem with rubbish because things like plastic and disposable nappies hadn't been invented. There wasn't so much packaging on items you bought either. But now with everything so over packaged wrapped and disposable we are suffering the consequences of far too much waste. The trouble is not everything can be recycled or will rot away. You used to be able to get a refund on glass bottles when you took them back to the shop. Now they are either collected from your house by the council or you can take them to a bottle bank. The fact that paper can be recycled and is easy to dispose is great, but remember paper is made from trees, which are important to the environment. The rainforests have been slowly disappearing for a while now. We need them not just because it helps with the climate. They are important as like all plants they give us oxygen. They are also a home to many animals who rely on them for their survival. The best waste is organic, dead leaves; carrot tops, onion skinร and so on all rot down and make fertile soil. This in turn will help the plants and vegetables giving them much needed food. So if youน are able to have a compost heap in your garden you'll be helping the environment and your garden wil love you for it. Acid rain is another serious problem it is damaging to plants and is caused by pollutants such as sulphur dioxide and nitrogen oxides. These come from the burning of coal, oil and gas. Dropping litter is not just a lazy thing to do it makes work for other people, is bad for the environment and looks ugly. So think before you drop litter either bin it or keep it and then bin it. When rivers and seas are polluted by waste we are not only stealing their beauty but were spoiling it for ourselves too. Our health can also suffer. Sadly accidents do occur; oil slicks sometimes happen and wreck the environment. Aninmals tend to suffer the most from these incidents. We should really have in place something that will prevent so much destruction, rather than just waiting for it to happen, then trying to clean up the damage. Nuclear waste has been the cause of controversy over the years. Radioactive material leaking out would be very serious indeed, it can cause real harm. This is why it is the most worrying. Although we are trying to stop the hole in the ozone layer getting any bigger, nuclear waste is still a serious problem. The 0zone layer protects us from harmful ultra - violet rays. Its hole has been caused by chlorofluorocarbons (cfc's) a chemical that was found in some products. Refrigerators used to contain them. So do we care enough about the earth we have inherited and our passing onto future generations? Or is it now all too late to do anything? Each one of us can make a difference and each and every one of us is responsible to the environment. It takes care of us; we should take care of it. Source: http://www.childrenswebmagazine.com/Environment.htm (slightly adapted) A) Say who or what the following words refer to. 7. these 1. them 8. it 2. they 9. their 3. them 10. these 4. นร 11. we 5. who 12. them 6. them 13. it

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Fill in the blanks with the given words. reinforced concrete insulators cross-linked ceramics melting Superior polymer polymerization non-biodegradable hard inert plastic composite branched monomer 1. A is a large molecule with many repeating smaller unit of the same kind. 2. A is the smaller unit that joins up repeatedly to form a polymer. 3. is a process in which monomers combine chemically to produce a polymer. 4. There are three types of polymers based on their structures, namely linear polymers, polymers and - polymers. 5. synthetic fiber and synthetic rubber are examples of polymers. 6. Generally, synthetic polymers are to chemicals, thermal and electrical เand light. 7. Synthetic polymers can cause pollution because they are 8. are inorganic non-metallic solids that are heated to become hard. 9. Generally, ceramics are strong, inert to chemicals, good insulator of electricity and heat and have high -point. 10. A material is formed when two or more different substances are combined. 11. The properties of composite materials are more properties of the original components. than the 12. Examples of composite materials are and fiberglass. Chapter 3 555 Materials

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